P22A8

NOx Sensor Heater Sense Circuit Low Bank 1 Sensor 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$89–278 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased fuel consumption
Dips during acceleration
Unstable idling

Causes

NOx sensor heater circuit short circuit
Broken or damaged wiring
NOx sensor malfunction
Problems with the engine control unit
Contact corrosion

How to Fix

Check the integrity of wiring and connectors
Measure the resistance of the sensor heater
Check voltage on heater circuit
Replace NOx sensor if necessary
Reset the error code and check the system

Related codes

P22A9 P229F P2200